4JRYKI J J, KASVI, MATTI V. Managing Knowledge and Knowledge Competence in Projects and Project Organizations [ J ]. International Journal of Project Management, 2003, 21 : 571 -582.
5NKERI R, MATTI V. Characteristics of Knowledge Sharing Communities in Project Organizations [ J]. International Journal of Project Management, 2005, 23 : 374 - 379
6MARKUS M L Paradigm Shifts E -business/integration Integration [J]. Communication dAIS, 2000, 4 (7) : 1 -45.
2Dong-Gil Ko.Knowledge management across the enterprise resource planning systems life cycle[J].International Journal of Accounting Information Systems.2002,3(2):99～110.
3Moghadas S M. Two core group models for sexual transmission of disease[J]. Ecological Modelling, 2002 ,148 (1) : 15-26.
4Hyman J M, Li J. An intuitive formulation for the reproductive number for the spread of diseases in heterogeneous populations [J]. Math Biosci, 2000 , 167(1): 65-86.
5Ma Z, Liu J P, Li J. Stability analysis for differential infectivity epidemic models [J]. Nonlinear Analysis:Real World Applications, 2003 , 4(5): 841-856.
6Moreira H N, Wang Y. Global stability in an S→I→R→Imodel [J]. SIAM Rev, 1997, 39(3): 496 - 502.
7Zhang X, Chen L S. The periodic solution of a class of epidemic models [J]. Computers and Mathematics with applications, 1999 , 38(3-4): 61-71.
8Anderson R M, May R M. Infectious Diseases of Humans: Dynamics and Control[M]. Oxford: Oxford University Press, 1991.
9Moghadas S M, Gumel A B. Global stability of a two-stage epidemic model with generalized non-linear incidence [J]. Mathematics and computers in simulation, 2002 , 60(1-2): 107-118.
